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<h2><a href="closure_goog_useragent_jscript.js.html">jscript.js</a></h2>

<pre class="prettyprint lang-js">
<a name="line1"></a>// Licensed under the Apache License, Version 2.0 (the &quot;License&quot;);
<a name="line2"></a>// you may not use this file except in compliance with the License.
<a name="line3"></a>// You may obtain a copy of the License at
<a name="line4"></a>//
<a name="line5"></a>//     http://www.apache.org/licenses/LICENSE-2.0
<a name="line6"></a>//
<a name="line7"></a>// Unless required by applicable law or agreed to in writing, software
<a name="line8"></a>// distributed under the License is distributed on an &quot;AS IS&quot; BASIS,
<a name="line9"></a>// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<a name="line10"></a>// See the License for the specific language governing permissions and
<a name="line11"></a>// limitations under the License.
<a name="line12"></a>
<a name="line13"></a>// Copyright 2007 Google Inc. All Rights Reserved.
<a name="line14"></a>
<a name="line15"></a>/**
<a name="line16"></a> * @fileoverview Detection of JScript version.
<a name="line17"></a> *
<a name="line18"></a> */
<a name="line19"></a>
<a name="line20"></a>
<a name="line21"></a>goog.provide(&#39;goog.userAgent.jscript&#39;);
<a name="line22"></a>
<a name="line23"></a>goog.require(&#39;goog.string&#39;);
<a name="line24"></a>
<a name="line25"></a>
<a name="line26"></a>/**
<a name="line27"></a> * @define {boolean} True if it is known at compile time that the runtime
<a name="line28"></a> *     environment will not be using JScript.
<a name="line29"></a> */
<a name="line30"></a>goog.userAgent.jscript.ASSUME_NO_JSCRIPT = false;
<a name="line31"></a>
<a name="line32"></a>
<a name="line33"></a>/**
<a name="line34"></a> * Initializer for goog.userAgent.jscript.  Detects if the user agent is using
<a name="line35"></a> * Microsoft JScript and which version of it.
<a name="line36"></a> *
<a name="line37"></a> * This is a named function so that it can be stripped via the jscompiler
<a name="line38"></a> * option for stripping types.
<a name="line39"></a> * @private
<a name="line40"></a> */
<a name="line41"></a>goog.userAgent.jscript.init_ = function() {
<a name="line42"></a>  var hasScriptEngine = &#39;ScriptEngine&#39; in goog.global;
<a name="line43"></a>
<a name="line44"></a>  /**
<a name="line45"></a>   * @type {boolean}
<a name="line46"></a>   * @private
<a name="line47"></a>   */
<a name="line48"></a>  goog.userAgent.jscript.DETECTED_HAS_JSCRIPT_ =
<a name="line49"></a>      hasScriptEngine &amp;&amp; goog.global[&#39;ScriptEngine&#39;]() == &#39;JScript&#39;;
<a name="line50"></a>
<a name="line51"></a>  /**
<a name="line52"></a>   * @type {string}
<a name="line53"></a>   * @private
<a name="line54"></a>   */
<a name="line55"></a>  goog.userAgent.jscript.DETECTED_VERSION_ =
<a name="line56"></a>      goog.userAgent.jscript.DETECTED_HAS_JSCRIPT_ ?
<a name="line57"></a>      (goog.global[&#39;ScriptEngineMajorVersion&#39;]() + &#39;.&#39; +
<a name="line58"></a>       goog.global[&#39;ScriptEngineMinorVersion&#39;]() + &#39;.&#39; +
<a name="line59"></a>       goog.global[&#39;ScriptEngineBuildVersion&#39;]()) :
<a name="line60"></a>      &#39;0&#39;;
<a name="line61"></a>};
<a name="line62"></a>
<a name="line63"></a>if (!goog.userAgent.jscript.ASSUME_NO_JSCRIPT) {
<a name="line64"></a>  goog.userAgent.jscript.init_();
<a name="line65"></a>}
<a name="line66"></a>
<a name="line67"></a>/**
<a name="line68"></a> * Whether we detect that the user agent is using Microsoft JScript.
<a name="line69"></a> * @type {boolean}
<a name="line70"></a> */
<a name="line71"></a>goog.userAgent.jscript.HAS_JSCRIPT = goog.userAgent.jscript.ASSUME_NO_JSCRIPT ?
<a name="line72"></a>    false : goog.userAgent.jscript.DETECTED_HAS_JSCRIPT_;
<a name="line73"></a>
<a name="line74"></a>
<a name="line75"></a>/**
<a name="line76"></a> * The installed version of JScript.
<a name="line77"></a> * @type {string}
<a name="line78"></a> */
<a name="line79"></a>goog.userAgent.jscript.VERSION = goog.userAgent.jscript.ASSUME_NO_JSCRIPT ?
<a name="line80"></a>    &#39;0&#39; : goog.userAgent.jscript.DETECTED_VERSION_;
<a name="line81"></a>
<a name="line82"></a>
<a name="line83"></a>/**
<a name="line84"></a> * Whether the installed version of JScript is as new or newer than a given
<a name="line85"></a> * version.
<a name="line86"></a> * @param {string} version The version to check.
<a name="line87"></a> * @return {boolean} Whether the installed version of JScript is as new or
<a name="line88"></a> *     newer than the given version.
<a name="line89"></a> */
<a name="line90"></a>goog.userAgent.jscript.isVersion = function(version) {
<a name="line91"></a>  return goog.string.compareVersions(goog.userAgent.jscript.VERSION,
<a name="line92"></a>                                     version) &gt;= 0;
<a name="line93"></a>};
</pre>


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